So you want to learn how to develop apps for Google GLASS? There are already a bunch of books available for GLASS development. Designing and Developing for Google Glass happens to be an upcoming book by Jason Salas and Allen Firstenberg. It will be released later in 2014 but you can get your hands on an early release now and save 50% today. It is all in celebration of Day Against DRM. Just use coupon DRM2014 today for the deal.